Improved fluid characterization for miscible gas floods

A. M. Egwuenu, R. T. Johns, Y. Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Equations-of-state (EOS) are typically tuned to black-oil PVT data such as constant volume depletion, constant composition expansion, differential liberation, and separator tests. Other PVT data more appropriate for gas injection could include multicontact and swelling tests. The standard method of tuning, however, does not typically incorporate important displacement parameters such as the minimum miscibility pressure or enrichment (MMP or MME) or the likely compositions that result in a reservoir from condensing-vaporizing (CV) displacements. This paper demonstrates an improved reservoir fluid characterization procedure for miscible gas floods that can more accurately represent the interaction of flow and phase behavior. We demonstrate the approach for two displacements, an eleven-component CO 2 flood and a twelve-component enriched gas flood. The method-of-characteristic (MOC) theory is used to determine the MME (or MMP) of both lumped and unlumped models. The results show that by tuning to the MME/MMP, fewer pseudocomponents are required to characterize the fluid than with conventional tuning methods. For the cases studied, fluids lumped to as few as four pseudocomponents can match well the composition profiles and oil recoveries of the unlumped models.

Original languageEnglish (US)
Title of host publication67th European Association of Geoscientists and Engineers, EAGE Conference and Exhibition, incorporating SPE EUROPEC 2005 - Extended Abstracts
PublisherSociety of Petroleum Engineers
Pages293-304
Number of pages12
ISBN (Print)9073781981, 9789073781986
DOIs
StatePublished - 2005
Event67th European Association of Geoscientists and Engineers, EAGE Conference and Exhibition, incorporating SPE EUROPEC 2005 - Extended Abstracts - Feria de Madrid, Spain
Duration: Jun 13 2005Jun 16 2005

Publication series

Name67th European Association of Geoscientists and Engineers, EAGE Conference and Exhibition, incorporating SPE EUROPE2005 - Extended Abstracts
Volume67th European Association of Geoscientists and Engineers Conf...

Other

Other67th European Association of Geoscientists and Engineers, EAGE Conference and Exhibition, incorporating SPE EUROPEC 2005 - Extended Abstracts
CountrySpain
CityFeria de Madrid
Period6/13/056/16/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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